This uses a static lbs_cmd_async_callback function, which is a
noop. Just setting the callback argument to __lbs_cmd_async()
to NULL won't work, because then the cmdnode wouldn't be
released.
This also makes __lbs_cmd_async() a static method, which is
now only used by lbs_cmd() and lbs_cmd_async().
Signed-off-by: Holger Schurig <hs4233@xxxxxxxxxxxxxxxxxxxx>
---
This patch is needed to fix the CMD_MAC_CONTROL bug correcly.
Compared with "take 1", this patch doesn't leak cmd_ctrl_node's
anymore.
[PATCH] libertas: make a handy lbs_cmd_async() command
This uses a static lbs_cmd_async_callback function, which is a noop. Just
setting the callback argument to __lbs_cmd_async() to NULL won't work,
because then the cmdnode wouldn't be released.
This also makes __lbs_cmd_async() a static method, which is now only used by
lbs_cmd() and lbs_cmd_async().
Signed-off-by: Holger Schurig <hs4233@xxxxxxxxxxxxxxxxxxxx>
---
This patch is needed to fix the CMD_MAC_CONTROL bug correcly. Patch for this
follows in the next mail.
Index: wireless-testing/drivers/net/wireless/libertas/cmd.c
===================================================================
--- wireless-testing.orig/drivers/net/wireless/libertas/cmd.c 2008-03-19 09:04:44.000000000 +0100
+++ wireless-testing/drivers/net/wireless/libertas/cmd.c 2008-03-19 09:05:25.000000000 +0100
@@ -20,6 +20,46 @@ static void lbs_set_cmd_ctrl_node(struct
/**
+ * @brief Simple callback that copies response back into command
+ *
+ * @param priv A pointer to struct lbs_private structure
+ * @param extra A pointer to the original command structure for which
+ * 'resp' is a response
+ * @param resp A pointer to the command response
+ *
+ * @return 0 on success, error on failure
+ */
+int lbs_cmd_copyback(struct lbs_private *priv, unsigned long extra,
+ struct cmd_header *resp)
+{
+ struct cmd_header *buf = (void *)extra;
+ uint16_t copy_len;
+
+ copy_len = min(le16_to_cpu(buf->size), le16_to_cpu(resp->size));
+ memcpy(buf, resp, copy_len);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(lbs_cmd_copyback);
+
+/**
+ * @brief Simple callback that ignores the result. Use this if
+ * you just want to send a command to the hardware, but don't
+ * care for the result.
+ *
+ * @param priv ignored
+ * @param extra ignored
+ * @param resp ignored
+ *
+ * @return 0 for success
+ */
+static int lbs_cmd_async_callback(struct lbs_private *priv, unsigned long extra,
+ struct cmd_header *resp)
+{
+ return 0;
+}
+
+
+/**
* @brief Checks whether a command is allowed in Power Save mode
*
* @param command the command ID
@@ -1242,7 +1282,7 @@ void lbs_complete_command(struct lbs_pri
cmd->cmdwaitqwoken = 1;
wake_up_interruptible(&cmd->cmdwait_q);
- if (!cmd->callback)
+ if (!cmd->callback || cmd->callback == lbs_cmd_async_callback)
__lbs_cleanup_and_insert_cmd(priv, cmd);
priv->cur_cmd = NULL;
}
@@ -2018,32 +2058,10 @@ void lbs_ps_confirm_sleep(struct lbs_pri
}
-/**
- * @brief Simple callback that copies response back into command
- *
- * @param priv A pointer to struct lbs_private structure
- * @param extra A pointer to the original command structure for which
- * 'resp' is a response
- * @param resp A pointer to the command response
- *
- * @return 0 on success, error on failure
- */
-int lbs_cmd_copyback(struct lbs_private *priv, unsigned long extra,
- struct cmd_header *resp)
-{
- struct cmd_header *buf = (void *)extra;
- uint16_t copy_len;
-
- copy_len = min(le16_to_cpu(buf->size), le16_to_cpu(resp->size));
- memcpy(buf, resp, copy_len);
- return 0;
-}
-EXPORT_SYMBOL_GPL(lbs_cmd_copyback);
-
-struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv, uint16_t command,
- struct cmd_header *in_cmd, int in_cmd_size,
- int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
- unsigned long callback_arg)
+static struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv,
+ uint16_t command, struct cmd_header *in_cmd, int in_cmd_size,
+ int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
+ unsigned long callback_arg)
{
struct cmd_ctrl_node *cmdnode;
@@ -2080,9 +2098,6 @@ struct cmd_ctrl_node *__lbs_cmd_async(st
lbs_deb_host("PREP_CMD: command 0x%04x\n", command);
- /* here was the big old switch() statement, which is now obsolete,
- * because the caller of lbs_cmd() sets up all of *cmd for us. */
-
cmdnode->cmdwaitqwoken = 0;
lbs_queue_cmd(priv, cmdnode);
wake_up_interruptible(&priv->waitq);
@@ -2092,6 +2107,15 @@ struct cmd_ctrl_node *__lbs_cmd_async(st
return cmdnode;
}
+void lbs_cmd_async(struct lbs_private *priv, uint16_t command,
+ struct cmd_header *in_cmd, int in_cmd_size)
+{
+ lbs_deb_enter(LBS_DEB_CMD);
+ __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
+ lbs_cmd_async_callback, 0);
+ lbs_deb_leave(LBS_DEB_CMD);
+}
+
int __lbs_cmd(struct lbs_private *priv, uint16_t command,
struct cmd_header *in_cmd, int in_cmd_size,
int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
Index: wireless-testing/drivers/net/wireless/libertas/cmd.h
===================================================================
--- wireless-testing.orig/drivers/net/wireless/libertas/cmd.h 2008-03-19 09:04:44.000000000 +0100
+++ wireless-testing/drivers/net/wireless/libertas/cmd.h 2008-03-19 09:04:46.000000000 +0100
@@ -18,12 +18,9 @@
#define lbs_cmd_with_response(priv, cmdnr, cmd) \
lbs_cmd(priv, cmdnr, cmd, lbs_cmd_copyback, (unsigned long) (cmd))
-/* __lbs_cmd() will free the cmdnode and return success/failure.
- __lbs_cmd_async() requires that the callback free the cmdnode */
-struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv, uint16_t command,
- struct cmd_header *in_cmd, int in_cmd_size,
- int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
- unsigned long callback_arg);
+void lbs_cmd_async(struct lbs_private *priv, uint16_t command,
+ struct cmd_header *in_cmd, int in_cmd_size);
+
int __lbs_cmd(struct lbs_private *priv, uint16_t command,
struct cmd_header *in_cmd, int in_cmd_size,
int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
--
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